Phosphorus

Although phosphorus is used in much smaller quantities than nitrogen and potassium, its presence is needed continuously Initially, phosphorus is important for early root growth, especially under cool soil conditions, but it also has a profound effect on both vegetative growth and fruit set throughout the crop. Symptoms of deficiency include a characteristic purple color of the veins and stem, thin growth, and poor cluster development. Phosphorus toxicity is uncommon. Phosphorus is stored well in soil but is easily leached in peat media. It is therefore imperative that phosphorus always be included in the feed of peat-grown crops.

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.